Revert of Browser Side Text Input State Tracking for OOPIF (Manual).

content/browser/frame_host/interstitial_page_impl.h

Index: content/browser/frame_host/interstitial_page_impl.h
diff --git a/content/browser/frame_host/interstitial_page_impl.h b/content/browser/frame_host/interstitial_page_impl.h
index 86f96558257be089391678e3dc4d82a610eaad4e..cbefe14f18f9ffea664961b18b5290930f7a9532 100644
--- a/content/browser/frame_host/interstitial_page_impl.h
+++ b/content/browser/frame_host/interstitial_page_impl.h
@@ -31,7 +31,6 @@ class NavigationControllerImpl;
 class RenderViewHostImpl;
 class RenderWidgetHostView;
 class WebContentsView;
-struct TextInputState;
 
 enum ResourceRequestAction {
   BLOCK,
@@ -155,9 +154,6 @@ class CONTENT_EXPORT InterstitialPageImpl
 
   // RenderWidgetHostDelegate implementation:
   void RenderWidgetDeleted(RenderWidgetHostImpl* render_widget_host) override;
-  const TextInputState* GetTextInputState() override;
-  void UpdateTextInputState(RenderWidgetHostViewBase* rwhv,
-                            bool text_input_state_changed) override;
   bool PreHandleKeyboardEvent(const NativeWebKeyboardEvent& event,
                               bool* is_keyboard_shortcut) override;
   void HandleKeyboardEvent(const NativeWebKeyboardEvent& event) override;
@@ -300,8 +296,6 @@ class CONTENT_EXPORT InterstitialPageImpl
 
   scoped_refptr<SessionStorageNamespace> session_storage_namespace_;
 
-  std::unique_ptr<TextInputState> text_input_state_;
-
   base::WeakPtrFactory<InterstitialPageImpl> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(InterstitialPageImpl);